linux-kernel - [RFC PATCH 1/3] kvm: x86: Rename KVM_DEBUGREG_RELOAD to KVM_DEBUGREG_NEED

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Date:   Thu, 16 Apr 2020 18:15:07 +0800
From:   Xiaoyao Li <xiaoyao.li@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        kvm@...r.kernel.org
Cc:     Nadav Amit <namit@...technion.ac.il>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        linux-kernel@...r.kernel.org, Xiaoyao Li <xiaoyao.li@...el.com>
Subject: [RFC PATCH 1/3] kvm: x86: Rename KVM_DEBUGREG_RELOAD to KVM_DEBUGREG_NEED_RELOAD

To make it more clear that the flag means DRn (except DR7) need to be
reloaded before vm entry.

Signed-off-by: Xiaoyao Li <xiaoyao.li@...el.com>
---
 arch/x86/include/asm/kvm_host.h | 2 +-
 arch/x86/kvm/x86.c              | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index c7da23aed79a..f465c76e6e5a 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -511,7 +511,7 @@ struct kvm_pmu_ops;
 enum {
 	KVM_DEBUGREG_BP_ENABLED = 1,
 	KVM_DEBUGREG_WONT_EXIT = 2,
-	KVM_DEBUGREG_RELOAD = 4,
+	KVM_DEBUGREG_NEED_RELOAD = 4,
 };
 
 struct kvm_mtrr_range {
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index de77bc9bd0d7..cce926658d10 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1067,7 +1067,7 @@ static void kvm_update_dr0123(struct kvm_vcpu *vcpu)
 	if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
 		for (i = 0; i < KVM_NR_DB_REGS; i++)
 			vcpu->arch.eff_db[i] = vcpu->arch.db[i];
-		vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD;
+		vcpu->arch.switch_db_regs |= KVM_DEBUGREG_NEED_RELOAD;
 	}
 }
 
@@ -8407,7 +8407,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
 		set_debugreg(vcpu->arch.eff_db[2], 2);
 		set_debugreg(vcpu->arch.eff_db[3], 3);
 		set_debugreg(vcpu->arch.dr6, 6);
-		vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD;
+		vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_NEED_RELOAD;
 	}
 
 	kvm_x86_ops.run(vcpu);
@@ -8424,7 +8424,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
 		kvm_update_dr0123(vcpu);
 		kvm_update_dr6(vcpu);
 		kvm_update_dr7(vcpu);
-		vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD;
+		vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_NEED_RELOAD;
 	}
 
 	/*
-- 
2.20.1